Abstract
Interleukin-23 (IL-23), an IL-12 family cytokine, plays pivotal roles in pro-inflammatory T helper 17 cell responses linked to autoimmune and inflammatory diseases. Despite intense therapeutic targeting, structural and mechanistic insights into receptor complexes mediated by IL-23, and by IL-12 family members in general, have remained elusive. We determined a crystal structure of human IL-23 in complex with its cognate receptor, IL-23R, and revealed that IL-23R bound to IL-23 exclusively via its N-terminal immunoglobulin domain. The structural and functional hotspot of this interaction partially restructured the helical IL-23p19 subunit of IL-23 and restrained its IL-12p40 subunit to cooperatively bind the shared receptor IL-12Rβ1 with high affinity. Together with structural insights from the interaction of IL-23 with the inhibitory antibody briakinumab and by leveraging additional IL-23:antibody complexes, we propose a mechanistic paradigm for IL-23 and IL-12 whereby cognate receptor binding to the helical cytokine subunits primes recruitment of the shared receptors via the IL-12p40 subunit. IL-23, a human cytokine under intense clinical targeting, is pivotal to cellular responses underlying widespread inflammatory and autoimmune diseases, such as psoriasis and rheumatoid arthritis. Bloch et al. determine the structure of IL-23 bound by one of its receptors, IL-23R, and reveal how IL-23R activates IL-23 for recruiting IL-12Rβ1 to the signaling assembly. Together with identifying an interaction hotspot, such findings may contribute to additional approaches for the mechanistic and therapeutic interrogation of receptor complexes mediated by IL-12 family members.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 45-58.e6 |
| Journal | Immunity |
| Volume | 48 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jan 16 2018 |
Fingerprint
Keywords
- Crohn's disease
- cytokine-receptor complex
- IL-12Rβ1
- IL-23
- IL-23 receptor
- inflammation
- inflammatory bowel disease
- psoriasis
- rheumatoid arthritis
- structure
ASJC Scopus subject areas
- Immunology and Allergy
- Immunology
- Infectious Diseases
Cite this
Structural Activation of Pro-inflammatory Human Cytokine IL-23 by Cognate IL-23 Receptor Enables Recruitment of the Shared Receptor IL-12Rβ1. / Bloch, Yehudi; Bouchareychas, Laura; Merceron, Romain; Składanowska, Katarzyna; Van den Bossche, Lien; Detry, Sammy; Govindarajan, Srinath; Elewaut, Dirk; Haerynck, Filomeen; Dullaers, Melissa; Adamopoulos, Iannis; Savvides, Savvas N.
In: Immunity, Vol. 48, No. 1, 16.01.2018, p. 45-58.e6.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Structural Activation of Pro-inflammatory Human Cytokine IL-23 by Cognate IL-23 Receptor Enables Recruitment of the Shared Receptor IL-12Rβ1
AU - Bloch, Yehudi
AU - Bouchareychas, Laura
AU - Merceron, Romain
AU - Składanowska, Katarzyna
AU - Van den Bossche, Lien
AU - Detry, Sammy
AU - Govindarajan, Srinath
AU - Elewaut, Dirk
AU - Haerynck, Filomeen
AU - Dullaers, Melissa
AU - Adamopoulos, Iannis
AU - Savvides, Savvas N.
PY - 2018/1/16
Y1 - 2018/1/16
N2 - Interleukin-23 (IL-23), an IL-12 family cytokine, plays pivotal roles in pro-inflammatory T helper 17 cell responses linked to autoimmune and inflammatory diseases. Despite intense therapeutic targeting, structural and mechanistic insights into receptor complexes mediated by IL-23, and by IL-12 family members in general, have remained elusive. We determined a crystal structure of human IL-23 in complex with its cognate receptor, IL-23R, and revealed that IL-23R bound to IL-23 exclusively via its N-terminal immunoglobulin domain. The structural and functional hotspot of this interaction partially restructured the helical IL-23p19 subunit of IL-23 and restrained its IL-12p40 subunit to cooperatively bind the shared receptor IL-12Rβ1 with high affinity. Together with structural insights from the interaction of IL-23 with the inhibitory antibody briakinumab and by leveraging additional IL-23:antibody complexes, we propose a mechanistic paradigm for IL-23 and IL-12 whereby cognate receptor binding to the helical cytokine subunits primes recruitment of the shared receptors via the IL-12p40 subunit. IL-23, a human cytokine under intense clinical targeting, is pivotal to cellular responses underlying widespread inflammatory and autoimmune diseases, such as psoriasis and rheumatoid arthritis. Bloch et al. determine the structure of IL-23 bound by one of its receptors, IL-23R, and reveal how IL-23R activates IL-23 for recruiting IL-12Rβ1 to the signaling assembly. Together with identifying an interaction hotspot, such findings may contribute to additional approaches for the mechanistic and therapeutic interrogation of receptor complexes mediated by IL-12 family members.
AB - Interleukin-23 (IL-23), an IL-12 family cytokine, plays pivotal roles in pro-inflammatory T helper 17 cell responses linked to autoimmune and inflammatory diseases. Despite intense therapeutic targeting, structural and mechanistic insights into receptor complexes mediated by IL-23, and by IL-12 family members in general, have remained elusive. We determined a crystal structure of human IL-23 in complex with its cognate receptor, IL-23R, and revealed that IL-23R bound to IL-23 exclusively via its N-terminal immunoglobulin domain. The structural and functional hotspot of this interaction partially restructured the helical IL-23p19 subunit of IL-23 and restrained its IL-12p40 subunit to cooperatively bind the shared receptor IL-12Rβ1 with high affinity. Together with structural insights from the interaction of IL-23 with the inhibitory antibody briakinumab and by leveraging additional IL-23:antibody complexes, we propose a mechanistic paradigm for IL-23 and IL-12 whereby cognate receptor binding to the helical cytokine subunits primes recruitment of the shared receptors via the IL-12p40 subunit. IL-23, a human cytokine under intense clinical targeting, is pivotal to cellular responses underlying widespread inflammatory and autoimmune diseases, such as psoriasis and rheumatoid arthritis. Bloch et al. determine the structure of IL-23 bound by one of its receptors, IL-23R, and reveal how IL-23R activates IL-23 for recruiting IL-12Rβ1 to the signaling assembly. Together with identifying an interaction hotspot, such findings may contribute to additional approaches for the mechanistic and therapeutic interrogation of receptor complexes mediated by IL-12 family members.
KW - Crohn's disease
KW - cytokine-receptor complex
KW - IL-12Rβ1
KW - IL-23
KW - IL-23 receptor
KW - inflammation
KW - inflammatory bowel disease
KW - psoriasis
KW - rheumatoid arthritis
KW - structure
UR - http://www.scopus.com/inward/record.url?scp=85061173851&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85061173851&partnerID=8YFLogxK
U2 - 10.1016/j.immuni.2017.12.008
DO - 10.1016/j.immuni.2017.12.008
M3 - Article
C2 - 29287995
AN - SCOPUS:85061173851
VL - 48
SP - 45-58.e6
JO - Immunity
JF - Immunity
SN - 1074-7613
IS - 1
ER -